Oil burner



May 25 1926. 1,586,149

H. sRlFFoul.

OIL BURNER v Filed March 3l 1925 2 Sheets-Sheet 1 F 7 13 SIG 40. 73

"IIIIIIIII/ May 25 1926. 1,586,149

' H. GRIFFOUL OIL BURNER Filed March 5l 1925 2 Sheets-Sheet 2 5 x C I l5 i l 1 l l l l I V; l W Y 'A "\\l .1,9 jrl T l -l i I i Ik I l 1 l mi QN l Patented May 25, 1925,

findalle@ HENRY GRIFFOUL, F CLEVELAND, OHIO. V

OIL BURNER.'

Application filed March 31, 1925. Serial No. 19,715.

My invention relates to oil burners. Among the principal objects in vieware: The pro 'ision of an improved oil burner having self-containedmeans for varying-:J` the i volume of air passing therethrough Withoutaltering the pressure at which the air ispassed through the burner; toprovide an improved burner having a self-contained preheater; to providean improved burner adapted for operation with preheated air or dry steamat any temperature; to provide in an oil burner a novel manner of airdistribution; to provide an improved and novel form of air preheater; toprovide a novel manner of mounting such a preheater; and generally toprovide a simple and efficient airl preheater for use in connection withcrude oil gas burners.

`With these general objects in view and such others as will be apparentin the description, the invention resides in the novel combination,construction and arrangement of parts hereinafter described and claimedand illustrated in the accompanying drawings of Whichz Figure 1 is avertical section through the burner.

Figure 2 is an end elevation from the right of Figure 1.

Figure 3 is an elevation of the air preheating element associated withthe burner, and f Figure 4 is an end yelevation of the preheater asmounted over a furnace frame.

In detail, the burner comprises a semicylindrical nozzle carryingportion and a semi-cylindrical valve carrying portion 11, which portionsare secured together by means of fastening bolts 12 passed through theannular flanges 13 and 14: provided on the respective portions for thispurpose. The nozzle carrying portion 10 is provided with a constrictedend 15 having disposed centrally thereon a burner vent tube 16, whichtube communicates with the passage through the constricted neck 17 of aninternal air chamber 18 secured by means of the bolts 19 on theconstricted end'15 of the nozzle carrying portion and extending inwardlythereof. The inner end of the internal air chamber 18 is provided Withan outwardly flared "air inlet 20. An air inlet pipe 21 is threaded intothe side Wall of the nozzle portion 10 directly beneath the internal airchamber 18, Which internal air chamber is of a diameter materially lessthan the internal diameter of the nozzle carrying portion 10 so thatthis internal chamber is supported on the constricted ends 15 in spacedrelation from the walls of the nozzle carrying portion 10 to provide anair chamber, hereinafter referred to as the external air chamber 22,occupying practically the entire interior of the assembled burner.

rlhe valve carrying portion of the burner casing is provided with aclosed end Wall 23 on Which is supported internally thereof the base.-21 of a self-contained oil reservoir 25 having an internal oilcirculating passage 26 in communication With `an oil vinlet- 27extending through the side of the casing, and

With an oil drain pipe 28 extending from the lowermost portion thereofthrough the casing. I

The oil reservoir 25 is tubular,.\vith an external diameterapproximating the diameter of the interior air chamber 18 from which itis spaced, and the reservoir is supported in inwardly spaced relationfrom the end Wall 28 of the'casingv by meansof a web 29 extending froman oil delivery chamber 30 carried by the base 241 of the reservoir,which delivery chamber communicate-s with the passage 26 of thereservoir by means of av delivery passage 31 extending therebetween. Theinner end of the chamber 30 is provided With a reduced extension 32provided With a. central bore extending therethrough and formed Itoprovide a seat for a needle valve 33 carried by the inner end of a valvestem 34 passed through a stuffing box 35 mounted on the exterior of theadjacent Wall 23, and operated by means of the hand Wheels 3G on theextreme outer end thereof.

`The needle valve 33y controls' passage of the oil to the bore of a tube37 threaded into the end of the extension 32 and disposed longitudinallyof the interior of the 'burner casing, terminating at its opposite endin a burner nozzle 38 disposed at approximately the center of the burnertube 1G and constricted neck 17 of the internal air chamber. The nozzle38 is enlarged laterally and rounded being provided with a centralaperture 39 in alignment with an ejector tip 10 carried at the extremeend of the oil tube 37, and having its rear Walls perforated as at 41for the passage of air tl'ierethrough and out of the central aperture 39in the burner.

Disposed within the internal air chamber 18 and longitudinally slidableupon the tube 37 is a hollow cylinder 427 the exterior whereof isprovided with a series of teeth 43 in mesh with the case of a pinion 44secured to the inner end of a. shaft 45 journaled to a bushing 46extending through the side of the casing, so that upon rotation of thehand wheel 47 secured at the. outer end of the shaft 45 the cylinder 42will be caused to move longitudinally upon the tubes 37.

The outermost end of the cylinder 42 is provided with a lateral annularflange 48 wide enough to close the passage leading from the internal airchamber 18 to the restricted neck 17 thereof when the cylinder 42 ismoved into the position to bring the flange 48 into engagement with theend of the internal air chamber. lith the passage from the internal airchamber to the restricted neck 17 closed by the flange 48.l it will beseen that air is permitted to flow to the nozzle 38 through the interiorof the cylinder 42, thereby creating a suction at the tip 40.

Owing to the disposition and arrangement of the parts hereinbeforedescribed` heated air passing through the pipe 21 to the interior of thecasing will freely circulate around all the interior thereof andespecially around the oil reservoir 25 preheating the oil containedtherein. The only means of egress for the air within the casing isthrough the flared end 20 to the internal air chamber 18 and through therestricted neel( 17 thereof to t-he burner vent tube 1G. lt will be seenthat upon operation of the hand wheel 47 the cylinder 42 is movedlongitudinally upon the tube 37, to control the flow of air through therestricted neck 17. lVith the air valve, formed by the cylinder 42 withthe flange 48 in closed position, air is still permitted to flow throughthe burner by its passage through the interior of the cylinder out ofthe burner tip as described. thereby insuring a constant operation ofthe burner at all times irrespective of the adjustment of the volume ofair passing therethrough. Owing to the direct longitudinal alignment ofthe delivery chamber with the bore of the oil tube 37, sediment andforeign matter collecting in the tube may be easily removed therefrom bysimply removing the stuffing box and withdrawing the needle valvewhereby cleaning oil may be passed through the burner from end to end-In Figures 3 and 4 I have shown the burner as associated with the airpreheater, which 'comprises a hollow tube 50, semif-if'rular in form andrectangular in cresssection. The body of the tube is constructed of thinmetal, with the Width of the tube being considerably greater than theheight in cross-section to provide for a greater internal air expansionsurface.

At each end the tube is closed and in communication with one end thereofis an air inlet pipe 5l, while extending from the opposite end is an airoutlet pipe 52 in communication with an air inlet 21 of the. oil burner10.

ln the application of my invention the body of the preheater is disposedover the top of a furnace frame which furnace is provided with anaperture 5G in the top thereof whereby heated gases and air may passtherethrough to impinge upon the interior curved surface of thepreheater body 50 disposed directly thereabove. The furnace is of animproved type having the usual burner openings 57 extending thereinto.

lflhile l prefer to support the body of the preheater over the heatapertures 56 in the top of the furnace by reason of its rigid attachmenton air conduits 52, it is obvious that any approved supporting means maybe employed as desired without departing from the scope of theinvention. By reason of the semi-circular formation of the body of t-hepreheater the heated gases will impinge upon the under surface of thepre-- heater at approximately its central portion and be directedtherefrom downwardly along the sides to secure the maximum heatingeffect upon the under exposed surface of the preheater.

Preferably, the dimensions of the sections comprising the body of thepreheater 50 are such that the preheater will extend downwardly from thetop of the furnace along each side of the furnace frame so that inaddition to the direct heat passing through the heat aperture 56 thebody of the preheater will receive the benefit of the heat radiatingfrom the sides of the furnace frame along the lower end portion of theopposed ends of the preheater body. rl`he air inlet 51 is incommunication with the atmosphere and air passed through the tube isheated to its maximum efficiency he fore passing through the air outletpipe to enter the casing of the oil burner 10.

lllhile in this preferred form of the invention l have illustrated anddescribed certain details entering into the construction and operationthereof, it is to be understood that the invention is not to be limitedthereto, but that any desired changes or modifications may be made inthe structural details thereof as will .fall within the scope of theinvention as claimed.

l claim 1. An oil burner comprising a hollow casing provided with a`burner tube at one and, an air chamber support-ed in said casing andhaving an inlet and an outlet, a. valve controlled oil ejector in saidcasing, a delivery tube extending through said air chamber, an o-penended cylinder slidabley on said second-named tube and having aconstantly open passage therethrough, one end of said cylinder having anannular flange for closing the major portion of said burner tube.

2. An oil burner comprising a hollow casing provided with a main burnertube at one end, a sec-ond casing within said firstnained casing andhaving its end open for' the passage of air and being in communicationwith said main burner' tube, a valve controlled oil ejector extendingthrough said first and second-named casings, a cylindrical membermounted for sliding movement on said ejector and having an opening eX-tending entirely therethrough and open at all times, the forward portionof said member being provided with an annular flange closing the majorportion of said main burner tube, and means whereby said member may bemoved longitudinally on said oil ejector.

3. An oil burner comprising inner and outer casings having registeringoutlet tubes, an oil supply nozzle extending through said first andsecond-named casings and having a perforated substantiallysemi-spherical head communicating with the outlet tubes and said innercasing, a cylindrical member having bearings slidable on said nozzle,said cylindrical member being constantly open for the passage of air andadapted for communicating with the semi-spherical head of said nozzle,the forward portion of said member being provided 'with lan annular angeto close the space between said Isemispherical head and the walls ofsaid burner tubes, and means whereby said member may be movedlongitudinally.

ln testimony whereof I aiix my signature.

`HENRY GRIFFOUL.

